Techniques for filtering multi-component signals

ABSTRACT

Techniques are described herein for filtering and/or otherwise isolating or extracting components of multi-component signals. More specifically, embodiments of the present disclosure describe techniques for filtering and/or otherwise extracting a continuous wave component (or wireless power component) and a modulated data component from a multi-component signal. In some embodiments, the techniques describe systems, apparatuses and methods for filtering and/or otherwise isolating or extracting a frequency (e.g., modulated data component) from a continuous wave (e.g., wireless power component) without affecting the levels of other frequencies. The individual components or signals can be transmitted by one or more sources and received at one or more existing antennas of an electronic device simultaneously.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and benefit from U.S. ProvisionalPatent Application Ser. No. 62/073,917 titled “FILTERING REMOVAL OF ASINGLE CONTINUOUS WAVE SPECTRUM” filed on Oct. 31, 2014, which isexpressly incorporated by reference herein.

BACKGROUND

Delivering wireless power to electronic devices is a very challengingproblem that requires an electronic device to be configured withadditional dedicated circuitry and/or components that receive andprocess the wireless power. Unfortunately, adding the additionalcircuitry and/or components increases the costs and footprint (or size)of the electronic devices that are already space-limited and expensive.

Furthermore, reusing components such as, for example, an existingantenna, for additional purposes can result in processing circuitryreceiving signals that damage and/or otherwise affect proper functioningof components. For example, signal interference between a modulated datasignal and a wireless power signal in an integrated circuit, e.g. aWi-Fi chip or core, can result in damage to the chip and/or othercomponents of the electronic device. As discussed above, adding anadditional dedicated antenna to resolve the signal interference issuerequires extra space, increases costs and can require majormodifications to the underlying design of the electronic devices.

Accordingly, a need exists for technology that overcomes the problemdemonstrated above, as well as one that provides additional benefits.The examples provided herein of some prior or related systems and theirassociated limitations are intended to be illustrative and notexclusive. Other limitations of existing or prior systems will becomeapparent to those of skill in the art upon reading the followingDetailed Description.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments of the present invention are illustrated by wayof example and not limitation in the figures of the accompanyingdrawings, in which like references indicate similar elements.

FIG. 1 is a block diagram illustrating an example wireless powerdelivery environment depicting wireless power delivery from one or morewireless chargers to various wireless devices within the wireless powerdelivery environment, according to some embodiments.

FIG. 2 is a sequence diagram illustrating example operations between awireless charger and a wireless receiver device for commencing wirelesspower delivery, according to some embodiments.

FIG. 3 is a block diagram illustrating example components of a wirelesspower transmitter (charger), according to some embodiments.

FIG. 4 is a block diagram illustrating example components of a wirelesspower receiver (client), according to some embodiments.

FIG. 5 is a diagram illustrating an example signal extraction systemconfigured to extract a data component (or signal) and a power component(or signal) from a multi-component signal received at an antenna in awireless environment, according to some embodiments.

FIG. 6 is a diagram illustrating example wireless device including asignal extraction system configured to, among other features, extract adata component (or signal) and a power component (or signal) from amulti-component signal received at an antenna in a wireless environment,according to some embodiments.

FIGS. 7A and 7B are diagrams illustrating example components of varioussignal extraction systems, according to some embodiments.

FIG. 8 is a data flow diagram illustrating an example process forseparating a modulated data component and a power component from amulti-component signal, according to some embodiments.

FIGS. 9A and 9B are diagrams illustrating example components of signalextraction systems, according to some embodiments.

FIG. 10 depicts a block diagram illustrating example components of arepresentative mobile device or tablet computer with a wireless powerreceiver or client in the form of a mobile (or smart) phone or tabletcomputer device, according to some embodiments.

FIG. 11 depicts a diagrammatic representation of a machine, in theexample form, of a computer system within which a set of instructions,for causing the machine to perform any one or more of the methodologiesdiscussed herein, may be executed.

DETAILED DESCRIPTION

Techniques are described herein for filtering and/or otherwise isolatingor extracting components of multi-component signals. More specifically,embodiments of the present disclosure describe techniques for filteringand/or otherwise extracting a continuous wave component (or wirelesspower component) and a modulated data component from a multi-componentsignal. In some embodiments, the techniques describe systems,apparatuses and methods for filtering and/or otherwise isolating orseparating an information signal (e.g., modulated data component) from acontinuous wave (e.g., wireless power component) without affecting thelevels of other frequencies. The individual components or signals can betransmitted by one or more sources and received at one or more existingantennas of an electronic device simultaneously.

In some embodiments, the continuous wave components comprise wirelesspower signals that are received simultaneously and/or in conjunctionwith modulated data components at an electronic device within a wirelesspower delivery environment. For example, the continuous wave componentcan be a wireless power signal transmitted by a wireless powertransmission system (or charger) and the modulated data component can beany data communication signal such as, for example, a Wi-Fi signal, aBluetooth signal, a ZigBee signal, etc., that is transmitted by amodulated data source (e.g., a Wi-Fi or IEEE 802.11 router)

The techniques described herein allow reuse of existing components,particularly antennas, which reduce the costs of the electronic devicesand save valuable space. As described herein, one or more existing dataantennas (e.g., Wi-Fi antenna and/or Bluetooth antenna) can be utilizedto receive both modulated data signal and a continuous wave (or wirelesspower) signal. As discussed, the modulated data signal (or component)and wireless power signal (or component) can be transmitted by multiplesources and received simultaneously at the one or more existing dataantennas of an electronic device.

Additionally, because the individual components of the multi-componentsignals are isolated, extracted and routed to the appropriate processingcircuitry (e.g., modulated data component routed to Wi-Fi chip or core)for processing, the processing circuitry is protected from damage thatcan occur as a result of attempting to process multiple components ofthe multi-component signals. For example, in some embodiments, thetechniques isolate the modulated data component from a wireless powersignal (or component) to efficiently deliver wireless power and data ina wireless power delivery environment while protecting the electronicdevice's components (e.g., Wi-Fi chip or core) from failure.

By way of example and not limitation, the signal filtering techniquesdescribed herein can be used in various consumer, industrial, militaryand medical applications, etc.

The following description and drawings are illustrative and are not tobe construed as limiting. Numerous specific details are described toprovide a thorough understanding of the disclosure. However, in certaininstances, well-known or conventional details are not described in orderto avoid obscuring the description. References to one or an embodimentin the present disclosure can be, but not necessarily are, references tothe same embodiment; and, such references mean at least one of theembodiments.

Reference in this specification to “one embodiment” or “an embodiment”means that a particular feature, structure, or characteristic describedin connection with the embodiment is included in at least one embodimentof the disclosure. The appearances of the phrase “in one embodiment” invarious places in the specification are not necessarily all referring tothe same embodiment, nor are separate or alternative embodimentsmutually exclusive of other embodiments. Moreover, various features aredescribed which may be exhibited by some embodiments and not by others.Similarly, various requirements are described which may be requirementsfor some embodiments but no other embodiments.

The terms used in this specification generally have their ordinarymeanings in the art, within the context of the disclosure, and in thespecific context where each term is used. Certain terms that are used todescribe the disclosure are discussed below, or elsewhere in thespecification, to provide additional guidance to the practitionerregarding the description of the disclosure. For convenience, certainterms may be highlighted, for example using italics and/or quotationmarks. The use of highlighting has no influence on the scope and meaningof a term; the scope and meaning of a term is the same, in the samecontext, whether or not it is highlighted. It will be appreciated thatsame thing can be said in more than one way.

Consequently, alternative language and synonyms may be used for any oneor more of the terms discussed herein, nor is any special significanceto be placed upon whether or not a term is elaborated or discussedherein. Synonyms for certain terms are provided. A recital of one ormore synonyms does not exclude the use of other synonyms. The use ofexamples anywhere in this specification, including examples of any termsdiscussed herein, is illustrative only, and is not intended to furtherlimit the scope and meaning of the disclosure or of any exemplifiedterm. Likewise, the disclosure is not limited to various embodimentsgiven in this specification.

Without intent to further limit the scope of the disclosure, examples ofinstruments, apparatus, methods and their related results according tothe embodiments of the present disclosure are given below. Note thattitles or subtitles may be used in the examples for convenience of areader, which in no way should limit the scope of the disclosure. Unlessotherwise defined, all technical and scientific terms used herein havethe same meaning as commonly understood by one of ordinary skill in theart to which this disclosure pertains. In the case of conflict, thepresent document, including definitions, will control.

Any headings provided herein are for convenience only and do notnecessarily affect the scope or meaning of the claimed invention.

I. Wireless Charging System Overview/Architecture

FIG. 1 is a diagram illustrating an example wireless power deliveryenvironment 100 depicting wireless power delivery from one or morewireless chargers 101 to various wireless devices 102 within thewireless power delivery environment. More specifically, FIG. 1illustrates an example wireless power delivery environment 100 in whichwireless power and/or data can be delivered to available wirelessdevices 102.1-102.n having one or more power receiver clients103.1-103.n (also referred to herein as “wireless power receivers” or“wireless power clients”). The wireless power receivers are configuredto receive wireless power from one or more wireless chargers 101.

As shown in the example of FIG. 1, the wireless devices 102.1-102.n aremobile phone devices 102.2 and 102.n, respectively, and a wireless gamecontroller 102.1, although the wireless devices 102.1-102.n can be any(smart or dumb) wireless device or system that needs power and iscapable of receiving wireless power via one or more integrated powerreceiver clients 103.1-103.n. As discussed herein, the one or moreintegrated power receiver clients or “wireless power receivers” receiveand process power from one or more transmitters/chargers 101.a-101.n andprovide the power to the wireless devices 102.1-102.n for operationthereof.

Each charger 101 (also referred to herein as a “transmitter”, “array ofantennas” or “antenna array system”) can include multiple antennas 104,e.g., an antenna array including hundreds or thousands of antennas,which are capable of delivering wireless power to wireless devices 102.In some embodiments, the antennas are adaptively-phased radio frequencyantennas. The charger 101 is capable of determining the appropriatephases to deliver a coherent power transmission signal to the powerreceiver clients 103. The array is configured to emit a signal (e.g.,continuous wave or pulsed power transmission signal) from multipleantennas at a specific phase relative to each other. It is appreciatedthat use of the term “array” does not necessarily limit the antennaarray to any specific array structure. That is, the antenna array doesnot need to be structured in a specific “array” form or geometry.Furthermore, as used herein the term “array” or “array system” may beused include related and peripheral circuitry for signal generation,reception and transmission, such as radios, digital logic and modems. Insome embodiments, the charger 101 can have an embedded Wi-Fi hub.

The wireless devices 102 can include one or more receive power clients103. As illustrated in the example of FIG. 1, power delivery antennas104 a and data communication antennas 104 b are shown. The powerdelivery antennas 104 a are configured to provide delivery of wirelessradio frequency power in the wireless power delivery environment. Thedata communication antennas are configured to send data communicationsto and receive data communications from the power receiver clients103.1-103 and/or the wireless devices 102.1-102.n. In some embodiments,the data communication antennas can communicate via standard protocolssuch as Bluetooth, Wi-Fi, Zigbee, etc. Non-standard or hybridcommunication protocols are also possible.

Each power receiver client 103.1-103.n includes one or more antennas(not shown) for receiving signals from the chargers 101. Likewise, eachcharger 101.a-101.n includes an antenna array having one or moreantennas and/or sets of antennas capable of emitting continuous wavesignals at specific phases relative to each other. As discussed above,each array is capable of determining the appropriate phases fordelivering coherent signals to the power receiver clients 102.1-102.n.For example, coherent signals can be determined by computing the complexconjugate of a received beacon signal at each antenna of the array suchthat the coherent signal is properly phased for the particular powerreceiver client that transmitted the beacon signal.

Although not illustrated, each component of the environment, e.g.,wireless power receiver, charger, etc., can include control andsynchronization mechanisms, e.g., a data communication synchronizationmodule. The chargers 101.a-101.n can be connected to a power source suchas, for example, a power outlet or source connecting the chargers to astandard or primary alternating current (AC) power supply in a building.Alternatively or additionally, one or more of the chargers 101.a-101.ncan be powered by a battery or via other mechanisms.

In some embodiments, the power receiver clients 102.1-102.n and/or thechargers 101.a-101.n utilize reflective objects 106 such as, forexample, walls or other RF reflective obstructions within range tobeacon and deliver and/or receive wireless power and/or data within thewireless power delivery environment. The reflective objects 106 can beutilized for multi-directional signal communication regardless ofwhether a blocking object is in the line of sight between the chargerand the power receiver client.

As described herein, each wireless device 102.1-102.n can be any systemand/or device, and/or any combination of devices/systems that canestablish a connection with another device, a server and/or othersystems within the example environment 100. In some embodiments, thewireless devices 102.1-102.n include displays or other outputfunctionalities to present data to a user and/or input functionalitiesto receive data from the user. By way of example, a wireless device 102can be, but is not limited to, a video game controller, a serverdesktop, a desktop computer, a computer cluster, a mobile computingdevice such as a notebook, a laptop computer, a handheld computer, amobile phone, a smart phone, a Personal Data Assistant (PDA), aBlackberry device, a Treo, and/or an iPhone, etc. The wireless device102 can also be any wearable device such as watches, necklaces, rings oreven devices embedded on or within the customer. Other examples of awireless device 102 include, but are not limited to, safety sensors(e.g., fire or carbon monoxide), electric toothbrushes, electronic doorlock/handles, electric light switch controller, electric shavers, etc.

Although not illustrated in the example of FIG. 1, the charger 101 andthe power receiver clients 103.1-103.n can each include a datacommunication module for communication via a data channel. Alternativelyor additionally, the power receiver clients 103.1-103.n can direct thewireless devices 102.1-102.n to communicate with the charger viaexisting data communications modules.

Additionally, in some embodiments the beacon signal, which is primarilyreferred to herein as a continuous waveform, can alternatively oradditionally take the form of a modulated signal.

FIG. 2 is a sequence diagram 200 illustrating example operations betweena wireless charger 101 and a power receiver client 103 for commencingwireless power delivery, according to an embodiment. Initially,communication is established between the charger 101 and the powerreceiver client 103. The charger 101 subsequently sends a beaconingschedule to the power receiver client 103 to arrange the beaconbroadcasting and the RF power/data delivery schedule. Based on theschedule, the power receiver client 103 broadcasts the beacon. As shown,the charger 101 receives the beacon from the power receiver client 103and detects the phase (or direction) at which the beacon signal wasreceived. The charger 101 then delivers wireless power and/or data tothe power receiver client 103 based the phase (or direction) of thereceived beacon. That is, the charger 101 determines the complexconjugate of the phase and uses the complex conjugate to deliver powerto the power receiver client 103 in the same direction in which thebeacon signal was received from the power receiver client 103.

In some embodiments, the charger 101 includes many antennas; one or moreof which are used to deliver power to the power receiver client 103. Thecharger 101 can detect phases at which the beacon signals that arereceived at each antenna. The large number of antennas may result indifferent beacon signals being received at each antenna of the charger101. The charger may then determine the complex conjugate of the beaconsignals received at each antenna. Using the complex conjugates, one ormore antenna may emit a signal that takes into account the effects ofthe large number of antennas in the charger 101. In other words, thecharger 101 emits a signal from one or more antennas in such a way as tocreate an aggregate signal from the one or more of the antennas thatapproximately recreates the waveform of the beacon in the oppositedirection.

As described herein, wireless power can be delivered in power cycles. Amore detailed example of the signaling required to commence wirelesspower delivery is described below with reference to FIG. 3. As discussedherein, once paired, the charger and the client have an established linkfor transmission of RF power and for communication of data. Thefollowing example describes an example of the system power cycle (whichincludes the pairing process) according to an embodiment.

In an example of operation, a master bus controller (MBC), whichcontrols the charger array, receives power from a power source and isactivated. The MBC activates the proxy antenna elements on the chargerarray and the proxy antenna elements enter a default “discovery” mode toidentify available wireless receiver clients within range of the chargerarray. When a client is found, the antenna elements on the charger arraypower on, enumerate, and (optionally) calibrate.

Next, the MBC generates a Beacon Beat Schedule (BBS) cycle, and a PowerSchedule (PS) for all wireless power receiver clients that are toreceive power based on their corresponding properties and/orrequirements. The MBC also identifies any other available clients thatwill have their status queried in the Client Query Table (CQT). Clientsthat are placed in the CQT are those on “standby”, e.g., not receiving acharge. The BBS and PS are calculated based on vital information aboutthe clients such as, for example, battery status, currentactivity/usage, how much longer it has until it runs out of power,priority in terms of usage, etc.

The Proxy AE broadcasts the BBS to all clients. As discussed herein, theBBS indicates when each client should send a beacon. Likewise the PSindicates when and to which clients the array should send power to. Eachclient starts broadcasting its beacon and receiving power from the arrayper the BBS and PS. The Proxy can concurrently query the Client QueryTable to check the status of other available clients. A client can onlyexist in the BBS or the CQT (e.g., waitlist), but not in both. In someembodiments, a limited number of clients can be served on the BBS and PS(e.g., 32). Likewise, the CQT may also be limited to a number of clients(e.g., 32). Thus, for example, if more than 64 clients are within rangeof the charger, some of those clients would not be active in either theBBS or CQT. The information collected in the previous step continuouslyand/or periodically updates the BBS cycle and/or the PS.

FIG. 3 is a block diagram illustrating example components of a wirelesscharger 300, in accordance with an embodiment. As illustrated in theexample of FIG. 3, the wireless charger 300 includes a master buscontroller (MBC) board and multiple mezzanine boards that collectivelycomprise the antenna array. The MBC includes control logic 310, anexternal power interface (I/F) 320, a communication block 330, and proxy340. The mezzanine (or antenna array boards 350) each include multipleantennas 360 a-360 n. Some or all of the components can be omitted insome embodiments. Additional components are also possible.

The control logic 310 is configured to provide all control andintelligence to the array components. The control logic 310 may compriseone or more processors, FPGAs, memory units, etc., and direct andcontrol the various data and power communications. The communicationblock 330 can direct data communications on a data carrier frequency,such as the base signal clock for clock synchronization. The datacommunications can be Bluetooth, Wi-Fi, Zigbee, etc. Likewise, the proxy340 can communicate with clients via data communications as discussedherein. The data communications can be Bluetooth, Wi-Fi, Zigbee, etc.The external power interface 320 is configured to receive external powerand provide the power to various components. In some embodiments, theexternal power interface 320 may be configured to receive a standardexternal 24 Volt power supply. Alternative configurations are alsopossible.

FIG. 4 is a block diagram illustrating example components of a wirelesspower receiver (client), in accordance with some embodiments. Asillustrated in the example of FIG. 4, the receiver 400 includes controllogic 410, battery 420, communication block 430 and associated antenna470, power meter 440, rectifier 450, a combiner 455, beacon signalgenerator 460 and an associated antenna 480, and switch 465 connectingthe rectifier 450 or the beacon signal generator 460 to one or moreassociated antennas 490 a-n. Some or all of the components can beomitted in some embodiments. Additional components are also possible.

A combiner 455 receives and combines the received power transmissionsignals from the power transmitter in the event that the receiver 400has more than one antenna. The combiner can be any combiner or dividercircuit that is configured to achieve isolation between the output portswhile maintaining a matched condition. For example, the combiner 455 canbe a Wilkinson Power Divider circuit.

The rectifier 450 receives the combined power transmission signal fromthe combiner 455, if present, which is fed through the power meter 440to the battery 420 for charging. The power meter 440 measures thereceived power signal strength and provides the control logic 410 withthis measurement. The control logic 410 also may receive the batterypower level from the battery 420 itself. The control logic 410 may alsotransmit/receive via the communication block 430 a data signal on a datacarrier frequency, such as the base signal clock for clocksynchronization. The beacon signal generator 460 transmits the beaconsignal, or calibration signal, using either the antenna 480 or 490. Itmay be noted that, although the battery 420 is shown for being chargedand for providing power to the receiver 400, the receiver may alsoreceive its power directly from the rectifier 450. This may be inaddition to the rectifier 450 providing charging current to the battery420, or in lieu of providing charging. Also, it may be noted that theuse of multiple antennas is one example of implementation and thestructure may be reduced to one shared antenna.

A client identifier (ID) module 415 stores a client ID that can uniquelyidentify the power receiver client in a wireless power deliveryenvironment. For example, the ID can be transmitted to one or morechargers when communication are established. In some embodiments, powerreceiver clients may also be able to receive and identify other powerreceiver clients in a wireless power delivery environment based on theclient ID.

An optional motion sensor 495 can detect motion and signal the controllogic 410 to act accordingly. For example, when a device is receivingpower at high frequencies, e.g., above 500 MHz, its location may becomea hotspot of (incoming) radiation. Thus, when the device is on a person,e.g., embedded in a mobile device, the level of radiation may exceedacceptable radiation levels set by the Federal Communications Commission(FCC) or other medical/industrial authorities. To avoid any potentialradiation issue, the device may integrate motion detection mechanismssuch as accelerometers or equivalent mechanisms. Once the device detectsthat it is in motion, it may be assumed that it is being handled by auser, and would trigger a signal to the array either to stoptransmitting power to it, or to lower the received power to anacceptable fraction of the power. In cases where the device is used in amoving environment like a car, train or plane, the power might only betransmitted intermittently or at a reduced level unless the device isclose to losing all available power.

II. Filtering Multi-Component Signals (e.g., Data and Power Filters)

Existing technology does not have the capability to simultaneouslyreceive a continuous wave (e.g., a wireless power signal) and amodulated data signal via the same existing antennas in the wirelesslypowered electronic device. More specifically, the existing technology islimited in its ability to extract data from a modulated data signal inthe presence of interfering continuous wave RF energy when both signalsare simultaneously incident on the common antenna or antenna arrayconnected to the wirelessly power electronic device.

Accordingly, the signal extraction systems and apparatuses describedherein are configured to filter and/or otherwise isolate or extractcomponents of multi-component signals. In some embodiments, the signalextraction systems and apparatuses are configured to filter data andpower from multi-component signals. The signal extraction systems andapparatuses are discussed with primary reference to extraction of amodulated data signal and a wireless power signal simultaneouslyreceived by one or more existing modulated data antennas of anelectronic device. That is, in some examples of operation, a wirelesscharger delivers wireless power signals to various electronic deviceshaving embedded wireless power receivers or “clients” in a wirelesspower delivery environment. The electronic devices are equipped with oneor more wireless receivers that can leverage the existing modulated dataantenna e.g. Wi-Fi antenna for reception of power signals in addition tothe modulated data signals. As discussed above, without the filteringtechniques described herein, use of an existing modulated data antennacan result in damage to the modulated data integrated circuity as wellas an inability to decipher overlapping or simultaneous communicationsfrom a wireless power source and a modulated data source.

The signal extraction systems and apparatuses described herein allow theelectronic devices to receive both the modulated data signals and thewireless power signals simultaneously via one or more existing antennaswithout regard for damaging the modulated data processing circuitry, orcompromising modulated data integrity. Other examples and uses of thesignal extraction systems and apparatuses described herein are alsopossible.

FIG. 5 is a diagram illustrating an example signal extraction system 505configured to, among other features, extract a data component (orsignal) 530 and a power component (or signal) 540 from a multi-componentsignal 525 received at an antenna 520 in a wireless environment 500,according to some embodiments. As discussed herein, antenna 520 can bean existing modulated data antenna such as, for example, a Wi-Fi antennaand/or a Bluetooth antenna of a mobile electronic device.

According to the example of FIG. 5, the signal extraction system 505receives a continuous wave (e.g., wireless power signal) and a modulateddata signal (e.g., Wi-Fi signal) from one or more sources. The one ormore sources can include a wireless charger and a Wi-Fi router.Alternatively, a single source could include a wireless charger. Asdiscussed herein, a wireless charger can include hundreds or thousandsof antennas. In some examples, the wireless charger can include a Wi-Fihub. In such cases, a wireless power signal can be transmitted from themajority of the antennas of the wireless charger and a Wi-Fi signal canbe transmitted by one or more of the remaining antennas of the wirelesscharger.

The antenna 520 routes the multi-component signal 525 (e.g., thecontinuous wave and the modulated data signal) to the signal extractionsystem 505. The signal extraction system 505 receives themulti-component signal 525, and processes the received signal viafiltering and extraction elements to separate and/or otherwise extractthe modulated data component 530 and/or a continuous wave (or wirelesspower) component 540 from the multi-component signal 525. Onceextracted, the signal extraction system 505 can route the modulated datacomponent 530 and the continuous wave (or wireless power) component 540to appropriate channels for processing. This process is shown anddiscussed in greater detail with reference to FIG. 6.

FIG. 6 is a diagram illustrating example wireless device 602 including asignal extraction system 605 configured to, among other features,extract a data component (or signal) 630 and a power component (orsignal) 640 from a multi-component signal 625 received at an antenna 620in a wireless environment 600, according to some embodiments. Morespecifically, in the example of FIG. 6, the signal extraction system 605is included as part of and/or otherwise embedded in a wireless powerreceiver (or client) 603. As discussed herein the wireless powerreceiver (or client) 603 is configured to receive and process wirelesspower signals from a wireless charger and utilize the power containedtherein. The signal extraction system 605 can be signal extractionsystem 505 of FIG. 5 although alternative configurations are possible.Likewise, the wireless power receiver (or client) 603 and wirelessdevice 602 can be wireless power receiver client 103 and wireless device102 of FIG. 1, respectively, although alternative configurations arepossible.

The example of FIG. 6 is similar to the example of FIG. 5 in that thesignal extraction system 505 receives a multi-component signal 625 andprocesses the received signal via filtering and extraction elements toseparate and/or otherwise extract a modulated data component 630 and acontinuous wave (or wireless power) component 640 from themulti-component signal 625. However, in the example of FIG. 6, thesignal extraction system 605 is shown embedded in wireless powerreceiver client 603. The wireless power receiver client 603 is embeddedin a wireless device 602. The wireless device 602 can be wireless device102 of FIG. 1 although alternative configurations are possible.

Once extracted, the signal extraction system 605 routes the modulateddata component 630 to a standard modulated data path that can include adata switch 665 configured to determine a type of modulated data (e.g.,Wi-Fi or Bluetooth) and route the modulated data to the appropriateintegrated circuitry (chip or core) for processing the data. Asillustrated in the example of FIG. 6, data chip 670A and 670B are shown,however the wireless device 602 can include any number of data chipsincluding a single data chip in which case no data switch 665 would beused.

The continuous wave (or wireless power) component 640 is routed to arectifier 650 that converts the received alternating current (AC) todirect current (DC) and then to a battery 660 for storage. A moredetailed description of the process of the wireless power receiver isdiscussed with reference to FIG. 4.

FIGS. 7A and 7B are diagrams illustrating example components of varioussignal extraction systems 700A and 700B, respectively, according to someembodiments. More specifically, the example components of signalextraction systems 700A and 700B include a two-way splitter 720, afilter network 730, a delay element 740, an amplitude compensationelement 745 and an extraction system 750. The examples of FIGS. 7A and7B are similar except for the placement of delay element 740 which isshown in processing path #1 in the example of FIG. 7B and in processingpath #2 in the example of FIG. 7A. One or more delay elements 740 can beplaced in processing paths #1 and/or #2 as long as the signals receivedat the extraction element 750 are received in-phase. Although not shown,the delay element 740 can alternatively or additionally be placed and/orotherwise included as part of the design of any of the two-way splitter720, the filter network 730, the delay element 740, and/or theextraction system 750.

The two-way splitter 720 can be any splitting device or elementconfigured to split the incoming multi-component signal 725 into twomulti-component signals 725 a and 725 b. In some embodiments, thesignals are then routed onto separate processing paths, multi-componentsignal 725 a onto processing path #2 and multi-component signal 725 bonto processing path #1. In the embodiments of FIGS. 7A and 7B, thetwo-way splitter 720 has a zero degree phase shift, although a phaseshift is possible on one or both ends of the two-way splitter 720 insome embodiments.

The filter network element 730 is configured to filter out the modulateddata component 710 of the multi-component signal 725. In someembodiments, the modulated data component 710 is filtered out using abandpass filter. For example, the multi-component signal 725 a can besplit evenly multiple times and routed through delay networks that areinteger multiples of the wavelength. The evenly split signals eachinclude a continuous wave part and a modulated data part. The evenlysplit signals can then be combined resulting in the continuous waveparts adding constructively and the modulated data parts (which sit ontop of the continuous wave parts) averaging (or cancelling) out throughthe filter network element 730 resulting in a filtered signal 735. Asdiscussed above, in the example of FIG. 7A, the filtered signal 735includes only the continuous wave or wireless power signal components.Various additional examples of bandpass filters are shown and discussedin greater detail with reference to FIGS. 9A and 9B.

In the example of FIG. 7A, the delay paths result in the filtered signal735 being out of phase with multi-component signal 725 b. As discussedabove, in some embodiments, both inputs to the extraction element 750need to be in-phase. Accordingly, the filtered signal 735 is routed tothe delay element 740 which provides additional phase compensationresulting in the delayed filtered signal 745 being in-phase with themulti-component signal 725 b at the input to the extraction element 750.Additionally, in some embodiments, both paths should the same or similarin amplitude as well as phase-compensated. The amplitude compensationelement 742 can provide the amplitude compensation. Although illustratedon processing path #2 (e.g., the filtered path), it is appreciated thatin some embodiments, amplitude compensation can be provided to either orboth paths.

The extraction element 750 is configured to receive the delayed filteredsignal 745 and the multi-component signal 725 b in-phase and process thesignals to extract the modulated data component (or signal) and/or thecontinuous wave (or wireless power) component (or signal). Asillustrated in the example of FIGS. 9A and 9B, the extraction element750 can be a Rat-Race Hybrid circuit (or component, also referred toherein as a “Rat-Race Coupler”). However, in some embodiments, theextraction element 750 can alternatively comprise a data delay network,a mixer, etc.

FIG. 8 is a data flow diagram illustrating an example process 800 forseparating a modulated data component and a power component from amulti-component signal, according to some embodiments. Morespecifically, FIG. 8 illustrates an example process for separating amodulated data component from a multi-component signal by using thepower component against the multi-component signal. A signal extractionsystem and, more particularly, an extraction element such as, forexample, extraction element 750 of FIGS. 7A and 7B can, among otherfunctions, perform the example process 800.

To begin, at process 810, the extraction element receives a first signalover a first path at a first input port of an extraction element. Thefirst signal is received includes the modulated data component and thepower component.

At process 812, the extraction element receives a second signal over asecond path at a second input port of the extraction element. The secondsignal is simultaneously received at the second port over a second pathin-phase with the first signal at the first port. Moreover, the secondsignal comprises a portion of the multi-component signal including thepower component.

Lastly, at process 814, the extraction element couples the first andsecond in-phase signals to constructively generate a sum signal anddestructively generate a difference signal. According to the example ofFIG. 8, the sum signal comprises the power component and the differencesignal comprises the modulated data component.

FIGS. 9A and 9B are diagrams illustrating example components of signalextraction systems, according to some embodiments. As described herein,a single existing data antenna (e.g., Wi-Fi antenna and/or Bluetoothantenna) can be utilized to receive both the modulated datacommunications (component or signal) and the wireless power signals (orcomponent).

As shown in examples of FIGS. 9A and 9B, both the data and the powersignals are routed to a 2-way splitter that directs the signals to afilter network element in the form of a Bandpass Filter (BPF) and asignal extraction element in the form of a Rat-Race Hybrid circuit (orcomponent). The BPF filters out the modulated data component from themulti-component (or mixed) signal which includes the combined modulateddata component and the wireless power component. In the examples ofFIGS. 9A and 9B, the filtered signal gets routed to the Rat-Race Hybridcircuit. The modulated data and wireless power mixed signal (ormulti-component signal) also gets routed to the Rat-Race Hybrid circuit.

The Rat-Race Hybrid circuit uses the wireless power signal againstitself to cancel the wireless power signal at a delta output. That is,at the delta output, the Rat-Race Hybrid circuit subtracts the output ofthe BPF (the wireless power component) from the multi-component signalresulting in the modulated data component. At a second output, the sumoutput, the signals are merged or added together. This results in twofiltered outputs at the Rat-Race Hybrid. The extracted communicationsignal gets routed to modulated data processing circuity (e.g., a Wi-Fichip or core) and the extracted wireless power signal (e.g., approximatepower signal) gets routed to a rectifier and ultimately to a battery foruse in powering another battery of the electronic device or for poweringthe electronic device directly.

An example of reconstruction/recovery is described below. To begin, ageneral expression for phase-modulated data is:S(t)=Ae ^(j(ωt+φ+φM(t)))  [1]

Where

A is an arbitrary constant

ω is the angular carrier frequency.

φ is an arbitrary phase offset

φM(t) is the angle of the phase modulation.

For the multiple-path filter, the input is split into N channels,delayed by integer numbers of wavelengths, and recombined after thevarious delays. The signal after recombination is:

$\begin{matrix}{{S(t)} = {\frac{A}{N}{\sum\limits_{k = 1}^{N}\left\lbrack {\exp\left( {j\;\left( {{\omega\; t} + \phi + {\phi\;{M_{k}(t)}} + {k\;\beta\;\lambda}} \right)} \right)} \right\rbrack}}} & \lbrack 2\rbrack\end{matrix}$

Assuming a zero mean for the phase modulation, we have a recombinedsignal of

$\begin{matrix}{{S(t)} = {\frac{A}{N}{\sum\limits_{k = 1}^{N}\left\lbrack {\exp\left( {j\left( {{\omega\; t} + \phi + {k\;\beta\;\lambda}} \right)} \right)} \right\rbrack}}} & \lbrack 3\rbrack\end{matrix}$

Since the delays are integer numbers of wavelengths, we have

$\begin{matrix}{{{\exp\left( {j\left( {{\omega\; t} + \phi} \right)} \right)} = {\exp\left( {j\left( {{\omega\; t} + \phi + {k\;\beta\;\lambda}} \right)} \right)}},} & \lbrack 4\rbrack \\{{S(t)} = {\frac{A}{N}{\sum\limits_{k = 1}^{N}\left\lbrack {\exp\left( {j\left( {{\omega\; t} + \phi} \right)} \right\rbrack} \right.}}} & \lbrack 5\rbrack\end{matrix}$

and thus,S(t)=A[exp(j(ωt+φ)]  [6]Which is simply the un-modulated carrier.

Next, data/carrier separation is discussed. For the general case ofreceived data, consider a continuous wave (CW) wireless power signal, aswell as a received phase-modulated RF signal as in [1], presented to asplitter. The output of each side is then:

$\begin{matrix}{{S(t)} = {{\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi} \right)} \right\rbrack} + {\frac{B}{2}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta} \right)} \right\rbrack}}} & \lbrack 7\rbrack\end{matrix}$

One side is further split by a N-Way splitter; each output is then

$\begin{matrix}{{S_{k}(t)} = {{\frac{A}{2N}\left\lbrack {\exp\left( {{j\;\omega} + \phi} \right)} \right\rbrack} + {\frac{B}{2N}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta} \right)} \right\rbrack}}} & \lbrack 8\rbrack\end{matrix}$

Each of these signals is processed as demonstrated above, leaving

$\begin{matrix}{{S(t)} = {\frac{A}{2}\left\lbrack {\exp\left( {j\left( {{\omega\; t} + \phi - \rho_{path}} \right)} \right\rbrack} \right.}} & \lbrack 9\rbrack\end{matrix}$

Where ρ_(path) is the accumulated delay from the interconnect andsplitter (common to all the delay elements). Recall that we assume thelow frequency phase-modulation is averaged out during thedelay/recombination process. We then add a compensating delay to providean overall phase equal to λ/2 for this filtered path or,

$\begin{matrix}{{S(t)} = {\frac{A}{2}\left\lbrack {\exp\left( {j\left( {{\omega\; t} + \phi - \pi} \right)} \right\rbrack} \right.}} & \lbrack 10\rbrack\end{matrix}$

Signal [10] is presented to the 180° tap (or input) of a rat-racecoupler (see, e.g., FIGS. 9A and 9B). The 0° rat-race tap (or input)receives the other side of the split received signal,amplitude-compensated for the path losses in the filter path. [7].

At the 90° tap of the rat-race, the two signals are added, yielding:

$\begin{matrix}{{S_{\lambda/4}(t)} = {{\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{\lambda}{4}} \right)} \right\rbrack} + {\frac{B}{2}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta - \frac{\lambda}{4}} \right)} \right\rbrack} + {\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{\lambda}{4} - \pi} \right)} \right\rbrack}}} & \lbrack 12\rbrack \\{{S_{\lambda/4}(t)} = {{\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{\lambda}{4}} \right)} \right\rbrack} + {\frac{B}{2}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta - \frac{\lambda}{4}} \right)} \right\rbrack} - {\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{\lambda}{4}} \right)} \right\rbrack}}} & \lbrack 13\rbrack \\{{{S_{\lambda/4}(t)} = {\frac{B}{2}\left\lbrack {\exp\left( {{j\;{\omega\mathbb{i}}\; t} + \phi - \frac{\lambda}{4}} \right)} \right\rbrack}},} & \lbrack 14\rbrack\end{matrix}$which leaves the baseband modulation, reduced by 3 dB.

An alternative path adds a λ/4 delay to the output of the bandpassfilter [10], and ¾λ to the non-bandlimited phase-modulated signal (atthe 0° rat-race port) which, when added at the ¾λ rat-race port yields:

$\begin{matrix}{{S_{3/4}(t)} = {{\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{3\lambda}{4}} \right)} \right\rbrack} + {\frac{B}{2}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta - \frac{3\;\lambda}{4}} \right)} \right\rbrack} - {\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{\lambda}{4} - \pi} \right)} \right\rbrack}}} & \lbrack 15\rbrack \\{{S_{3/4}(t)} = {{\frac{A}{2}\left\lbrack {\exp\left( {{j\;\omega\; t} + \phi - \frac{3\lambda}{4}} \right)} \right\rbrack} + {\frac{B}{2}\left\lbrack {\exp\left( {{j\;\omega\;{\mathbb{i}}\; t} + \theta - \frac{3\;\lambda}{4}} \right)} \right\rbrack}}} & \lbrack 16\rbrack\end{matrix}$Thus, the continuous-wave power signal and ½ of the modulated datasignal power is available to the rectifier for power conversion.

Example Systems

FIG. 10 depicts a block diagram illustrating example components of arepresentative electronic device 1000 with a wireless power receiver orclient in the form of a mobile (or smart) phone or tablet computerdevice, according to an embodiment. Various interfaces and modules areshown with reference to FIG. 10, however, the mobile device or tabletcomputer does not require all of modules or functions for performing thefunctionality described herein. It is appreciated that, in manyembodiments, various components are not included and/or necessary foroperation of the category controller. For example, components such asGPS radios, cellular radios, and accelerometers may not be included inthe controllers to reduce costs and/or complexity. Additionally,components such as ZigBee radios and RFID transceivers, along withantennas, can populate the Printed Circuit Board.

The wireless power receiver client can be a power receiver clients 103of FIG. 1, although alternative configurations are possible.Additionally, the wireless power receiver client can include one or moreRF antennas for reception of power and/or data signals from a charger,e.g., charger 101 of FIG. 1.

FIG. 11 depicts a diagrammatic representation of a machine, in theexample form, of a computer system within which a set of instructions,for causing the machine to perform any one or more of the methodologiesdiscussed herein, may be executed.

In the example of FIG. 11, the computer system includes a processor,memory, non-volatile memory, and an interface device. Various commoncomponents (e.g., cache memory) are omitted for illustrative simplicity.The computer system 1100 is intended to illustrate a hardware device onwhich any of the components depicted in the example of FIG. 1 (and anyother components described in this specification) can be implemented.For example, the computer system can be any radiating object or antennaarray system. The computer system can be of any applicable known orconvenient type. The components of the computer system can be coupledtogether via a bus or through some other known or convenient device.

The processor may be, for example, a conventional microprocessor such asan Intel Pentium microprocessor or Motorola power PC microprocessor. Oneof skill in the relevant art will recognize that the terms“machine-readable (storage) medium” or “computer-readable (storage)medium” include any type of device that is accessible by the processor.

The memory is coupled to the processor by, for example, a bus. Thememory can include, by way of example but not limitation, random accessmemory (RAM), such as dynamic RAM (DRAM) and static RAM (SRAM). Thememory can be local, remote, or distributed.

The bus also couples the processor to the non-volatile memory and driveunit. The non-volatile memory is often a magnetic floppy or hard disk, amagnetic-optical disk, an optical disk, a read-only memory (ROM), suchas a CD-ROM, EPROM, or EEPROM, a magnetic or optical card, or anotherform of storage for large amounts of data. Some of this data is oftenwritten, by a direct memory access process, into memory during executionof software in the computer 1200. The non-volatile storage can be local,remote, or distributed. The non-volatile memory is optional becausesystems can be created with all applicable data available in memory. Atypical computer system will usually include at least a processor,memory, and a device (e.g., a bus) coupling the memory to the processor.

Software is typically stored in the non-volatile memory and/or the driveunit. Indeed, for large programs, it may not even be possible to storethe entire program in the memory. Nevertheless, it should be understoodthat for software to run, if necessary, it is moved to a computerreadable location appropriate for processing, and for illustrativepurposes, that location is referred to as the memory in this paper. Evenwhen software is moved to the memory for execution, the processor willtypically make use of hardware registers to store values associated withthe software, and local cache that, ideally, serves to speed upexecution. As used herein, a software program is assumed to be stored atany known or convenient location (from non-volatile storage to hardwareregisters) when the software program is referred to as “implemented in acomputer-readable medium”. A processor is considered to be “configuredto execute a program” when at least one value associated with theprogram is stored in a register readable by the processor.

The bus also couples the processor to the network interface device. Theinterface can include one or more of a modem or network interface. Itwill be appreciated that a modem or network interface can be consideredto be part of the computer system. The interface can include an analogmodem, isdn modem, cable modem, token ring interface, satellitetransmission interface (e.g. “direct PC”), or other interfaces forcoupling a computer system to other computer systems. The interface caninclude one or more input and/or output devices. The I/O devices caninclude, by way of example but not limitation, a keyboard, a mouse orother pointing device, disk drives, printers, a scanner, and other inputand/or output devices, including a display device. The display devicecan include, by way of example but not limitation, a cathode ray tube(CRT), liquid crystal display (LCD), or some other applicable known orconvenient display device. For simplicity, it is assumed thatcontrollers of any devices not depicted in the example of FIG. 11 residein the interface.

In operation, the computer system 1100 can be controlled by operatingsystem software that includes a file management system, such as a diskoperating system. One example of operating system software withassociated file management system software is the family of operatingsystems known as Windows® from Microsoft Corporation of Redmond, Wash.,and their associated file management systems. Another example ofoperating system software with its associated file management systemsoftware is the Linux operating system and its associated filemanagement system. The file management system is typically stored in thenon-volatile memory and/or drive unit and causes the processor toexecute the various acts required by the operating system to input andoutput data and to store data in the memory, including storing files onthe non-volatile memory and/or drive unit.

Some portions of the detailed description may be presented in terms ofalgorithms and symbolic representations of operations on data bitswithin a computer memory. These algorithmic descriptions andrepresentations are the means used by those skilled in the dataprocessing arts to most effectively convey the substance of their workto others skilled in the art. An algorithm is here, and generally,conceived to be a self-consistent sequence of operations leading to adesired result. The operations are those requiring physicalmanipulations of physical quantities. Usually, though not necessarily,these quantities take the form of electrical or magnetic signals capableof being stored, transferred, combined, compared, and otherwisemanipulated. It has proven convenient at times, principally for reasonsof common usage, to refer to these signals as bits, values, elements,symbols, characters, terms, numbers, or the like.

It should be borne in mind, however, that all of these and similar termsare to be associated with the appropriate physical quantities and aremerely convenient labels applied to these quantities. Unlessspecifically stated otherwise, as apparent from the followingdiscussion, it is appreciated that throughout the description,discussions utilizing terms such as “processing” or “computing” or“calculating” or “determining” or “displaying” or the like, refer to theaction and processes of a computer system, or similar electroniccomputing device, that manipulates and transforms data represented asphysical (electronic) quantities within the computer system's registersand memories into other data similarly represented as physicalquantities within the computer system memories or registers or othersuch information storage, transmission or display devices.

The algorithms and displays presented herein are not inherently relatedto any particular computer or other apparatus. Various general purposesystems may be used with programs in accordance with the teachingsherein, or it may prove convenient to construct more specializedapparatus to perform the methods of some embodiments. The requiredstructure for a variety of these systems will appear from thedescription below. In addition, the techniques are not described withreference to any particular programming language, and variousembodiments may thus be implemented using a variety of programminglanguages.

In alternative embodiments, the machine operates as a standalone deviceor may be connected (e.g., networked) to other machines. In a networkeddeployment, the machine may operate in the capacity of a server or aclient machine in a client-server network environment or as a peermachine in a peer-to-peer (or distributed) network environment.

The machine may be a server computer, a client computer, a personalcomputer (PC), a tablet PC, a laptop computer, a set-top box (STB), apersonal digital assistant (PDA), a cellular telephone, an iPhone, aBlackberry, a processor, a telephone, a web appliance, a network router,switch or bridge, or any machine capable of executing a set ofinstructions (sequential or otherwise) that specify actions to be takenby that machine.

While the machine-readable medium or machine-readable storage medium isshown in an exemplary embodiment to be a single medium, the term“machine-readable medium” and “machine-readable storage medium” shouldbe taken to include a single medium or multiple media (e.g., acentralized or distributed database, and/or associated caches andservers) that store the one or more sets of instructions. The term“machine-readable medium” and “machine-readable storage medium” shallalso be taken to include any medium that is capable of storing, encodingor carrying a set of instructions for execution by the machine and thatcause the machine to perform any one or more of the methodologies of thepresently disclosed technique and innovation.

In general, the routines executed to implement the embodiments of thedisclosure, may be implemented as part of an operating system or aspecific application, component, program, object, module or sequence ofinstructions referred to as “computer programs.” The computer programstypically comprise one or more instructions set at various times invarious memory and storage devices in a computer, and that, when readand executed by one or more processing units or processors in acomputer, cause the computer to perform operations to execute elementsinvolving the various aspects of the disclosure.

Moreover, while embodiments have been described in the context of fullyfunctioning computers and computer systems, those skilled in the artwill appreciate that the various embodiments are capable of beingdistributed as a program product in a variety of forms, and that thedisclosure applies equally regardless of the particular type of machineor computer-readable media used to actually effect the distribution.

Further examples of machine-readable storage media, machine-readablemedia, or computer-readable (storage) media include but are not limitedto recordable type media such as volatile and non-volatile memorydevices, floppy and other removable disks, hard disk drives, opticaldisks (e.g., Compact Disk Read-Only Memory (CD ROMS), Digital VersatileDisks, (DVDs), etc.), among others, and transmission type media such asdigital and analog communication links.

Unless the context clearly requires otherwise, throughout thedescription and the claims, the words “comprise,” “comprising,” and thelike are to be construed in an inclusive sense, as opposed to anexclusive or exhaustive sense; that is to say, in the sense of“including, but not limited to.” As used herein, the terms “connected,”“coupled,” or any variant thereof, means any connection or coupling,either direct or indirect, between two or more elements; the coupling ofconnection between the elements can be physical, logical, or acombination thereof. Additionally, the words “herein,” “above,” “below,”and words of similar import, when used in this application, shall referto this application as a whole and not to any particular portions ofthis application. Where the context permits, words in the above DetailedDescription using the singular or plural number may also include theplural or singular number respectively. The word “or,” in reference to alist of two or more items, covers all of the following interpretationsof the word: any of the items in the list, all of the items in the list,and any combination of the items in the list.

The above detailed description of embodiments of the disclosure is notintended to be exhaustive or to limit the teachings to the precise formdisclosed above. While specific embodiments of, and examples for, thedisclosure are described above for illustrative purposes, variousequivalent modifications are possible within the scope of thedisclosure, as those skilled in the relevant art will recognize. Forexample, while processes or blocks are presented in a given order,alternative embodiments may perform routines having steps, or employsystems having blocks, in a different order, and some processes orblocks may be deleted, moved, added, subdivided, combined, and/ormodified to provide alternative or subcombinations. Each of theseprocesses or blocks may be implemented in a variety of different ways.Also, while processes or blocks are, at times, shown as being performedin a series, these processes or blocks may instead be performed inparallel, or may be performed at different times. Further, any specificnumbers noted herein are only examples: alternative implementations mayemploy differing values or ranges.

The teachings of the disclosure provided herein can be applied to othersystems, not necessarily the system described above. The elements andacts of the various embodiments described above can be combined toprovide further embodiments.

Any patents and applications and other references noted above, includingany that may be listed in accompanying filing papers, are incorporatedherein by reference. Aspects of the disclosure can be modified, ifnecessary, to employ the systems, functions, and concepts of the variousreferences described above to provide yet further embodiments of thedisclosure.

These and other changes can be made to the disclosure in light of theabove Detailed Description. While the above description describescertain embodiments of the disclosure, and describes the best modecontemplated, no matter how detailed the above appears in text, theteachings can be practiced in many ways. Details of the system may varyconsiderably in its implementation details, while still beingencompassed by the subject matter disclosed herein. As noted above,particular terminology used when describing certain features or aspectsof the disclosure should not be taken to imply that the terminology isbeing redefined herein to be restricted to any specific characteristics,features, or aspects of the disclosure with which that terminology isassociated. In general, the terms used in the following claims shouldnot be construed to limit the disclosure to the specific embodimentsdisclosed in the specification, unless the above Detailed Descriptionsection explicitly defines such terms. Accordingly, the actual scope ofthe disclosure encompasses not only the disclosed embodiments, but alsoall equivalent ways of practicing or implementing the disclosure underthe claims.

While certain aspects of the disclosure are presented below in certainclaim forms, the inventors contemplate the various aspects of thedisclosure in any number of claim forms. For example, while only oneaspect of the disclosure is recited as a means-plus-function claim under35 U.S.C. §112, ¶6, other aspects may likewise be embodied as ameans-plus-function claim, or in other forms, such as being embodied ina computer-readable medium. (Any claims intended to be treated under 35U.S.C. §112, ¶6 will begin with the words “means for”.) Accordingly, theapplicant reserves the right to add additional claims after filing theapplication to pursue such additional claim forms for other aspects ofthe disclosure.

The detailed description provided herein may be applied to othersystems, not necessarily only the system described above. The elementsand acts of the various examples described above can be combined toprovide further implementations of the invention. Some alternativeimplementations of the invention may include not only additionalelements to those implementations noted above, but also may includefewer elements. These and other changes can be made to the invention inlight of the above Detailed Description. While the above descriptiondefines certain examples of the invention, and describes the best modecontemplated, no matter how detailed the above appears in text, theinvention can be practiced in many ways. Details of the system may varyconsiderably in its specific implementation, while still beingencompassed by the invention disclosed herein. As noted above,particular terminology used when describing certain features or aspectsof the invention should not be taken to imply that the terminology isbeing redefined herein to be restricted to any specific characteristics,features, or aspects of the invention with which that terminology isassociated. In general, the terms used in the following claims shouldnot be construed to limit the invention to the specific examplesdisclosed in the specification, unless the above Detailed Descriptionsection explicitly defines such terms. Accordingly, the actual scope ofthe invention encompasses not only the disclosed examples, but also allequivalent ways of practicing or implementing the invention.

What is claimed is:
 1. A signal extraction apparatus for separating amodulated data component and a power component from a wirelesslyreceived multi-component signal, the apparatus comprising: a signalsplitting element configured to replicate the multi-component signal ona first signal processing path and a second signal processing path; afilter network element coupled to the two-way signal splitting element,the filter element configured to remove the modulated data componentfrom the multi-component signal on the second signal processing path; asignal separation element communicatively coupled to the two-waysplitting element and the filter network element via the first signalprocessing path and the second signal processing path, the signalseparation element configured to couple in-phase input signals toconstructively generate a sum signal and destructively generate adifference signal, wherein the sum signal comprises the power componentand the difference signal comprises the modulated data component; and adelay element configured to delay first signals on the first signalprocessing path or second signals the second signal processing path suchthat the input signals are in-phase at the signal separation element. 2.The signal extraction apparatus of claim 1, wherein the signalseparation element comprises a rat-race coupler having four ports, eachport situated one quarter wavelength away from each other around the tophalf of a ring, wherein the four ports include two input ports, asummation output port and a delta output port.
 3. The signal extractionapparatus of claim 1, wherein the signal splitting element comprises atwo-way signal splitting element.
 4. The signal extraction apparatus ofclaim 1, wherein the modulated data component and the power componentare received simultaneously at one or more antennas resulting in thereceived multi-component signal.
 5. The signal extraction apparatus ofclaim 4, wherein the modulated data component is transmitted by one ormore antennas of a modulated data source and the wireless powercomponent is transmitted by one or more antenna of a wireless charger.6. The signal extraction apparatus of claim 1, further comprising: firstrouting circuitry configured to route the power component to wirelesspower processing circuitry; and second routing circuitry configured torout the modulated data component to modulated data processingcircuitry.
 7. The signal extraction apparatus of claim 1, wherein thefilter network element comprises a band-pass filter.
 8. The signalextraction apparatus of claim 1, wherein the filter network elementfurther comprises: an N-way splitter configured to evenly split themulti-component signal into multiple sub-signals, wherein each of themultiple sub-signals have a corresponding power and modulated datasub-component; a delay network configured to route the multiplesub-signals through delays that are integer multiples of a wavelength ofthe multi-component signal; an N-way combiner configured to combineoutputs of the delay network such that the power sub-components addconstructively and the modulated data sub-components average out throughthe delay network.
 9. The signal extraction apparatus of claim 1,wherein the filter network element results in a one hundred andeighty-degree phase shift.
 10. An electronic device comprising: one ormore antennas configured to receive a multi-component signal, whereinthe multi-component signal includes a modulated data component and awireless power component; a signal extraction system for extracting themodulated data component and the wireless power component from themulti-component signal, the apparatus comprising: a signal splittingelement configured to replicate the multi-component signal on a firstsignal processing path and a second signal processing path; a filternetwork element coupled to the two-way signal splitting element, thefilter element configured to remove the modulated data component fromthe multi-component signal on the second signal processing path; asignal separation element communicatively coupled to the two-waysplitting element and the filter network element via the first signalprocessing path and the second signal processing path, the signalseparation element configured to couple in-phase input signals toconstructively generate a sum signal and destructively generate adifference signal, wherein the sum signal comprises an extracted powercomponent and the difference signal comprises an extracted modulateddata component; and a delay element configured to delay first signals onthe first signal processing path or second signals the second signalprocessing path so that the input signals are in-phase at the signalseparation element.
 11. The electronic device of claim 10, furthercomprising: modulated data processing circuitry configured to processthe extracted modulated data component.
 12. The electronic device ofclaim 10, further comprising: wireless power receiver circuitryconfigured to process the extracted wireless power component.
 13. Theelectronic device of claim 10, wherein the modulated data component andthe power component are received simultaneously at the one or moreantennas resulting in the received multi-component signal.
 14. Theelectronic device of claim 10, wherein the filter network elementcomprises a band-pass filter.
 15. The electronic device of claim 10,wherein the filter network element further comprises: an N-way splitterconfigured to evenly split the multi-component signal into multiplesub-signals, wherein each of the multiple sub-signals have acorresponding power and modulated data sub-component; a delay networkconfigured to route the multiple sub-signals through delays that areinteger multiples of a wavelength of the multi-component signal; anN-way combiner configured to combine outputs of the delay network suchthat the power sub-components add constructively and the modulated datasub-components average out through the delay network.
 16. The electronicdevice of claim 10, wherein the signal separation element comprises arat-race coupler having four ports each situated one quarter wavelengthaway from each other around the top half of a ring, wherein the fourports include two input ports, a summation output port and a deltaoutput port.
 17. The signal extraction apparatus of claim 1, wherein thesignal splitting element comprises a two-way signal splitting element,and wherein the filter network element results in a one hundred andeighty-degree phase shift.
 18. A method of separating a modulated datacomponent and a power component from a multi-component signal, themethod comprising: receiving a first signal at a first input port of anextraction element, wherein the first signal is received over a firstpath and includes the modulated data component and the power component;receiving a second signal at a second input port of the extractionelement, wherein the second signal is received at the second port over asecond path in-phase with the first signal at the first port, the secondsignal comprising a portion of the multi-component signal including thepower component; coupling the first and second in-phase signals toconstructively generate a sum signal and destructively generate adifference signal, wherein the sum signal comprises the power componentand the difference signal comprises the modulated data component. 19.The method of claim 18, further comprising: extracting the modulateddata component at a first output port of the extraction element; androuting the extracted modulated data component to modulated dataprocessing circuitry, wherein the modulated data processing circuitryprocesses the modulated data to identify a communication.
 20. The methodof claim 18, further comprising: extracting the wireless power componentat a second output port of the extraction element; and routing theextracted wireless power component to a rectifier of a wireless powerreceiver.